... ophthalmic Operating Microscope 1.Binocular tube, for one men. 2.4X to 24X zoom ... (Eyepiece moving between 0° ~180° is optional )Magnifications for Main Microscope(Diameter of Field)4× ~24× (41.5mm ... Vertical Range250mmFine Focusuing Range and Speed30mm, ≤ 2mm/sSpeed for X-Y and Range50mm× 50mm, ≤ 2mm/sInput VoltageAC220V ... microscope,4X to 24X zoom magnification, for one man(SOM-2000C)